温室气体
环境科学
灌溉
农学
作物轮作
产量(工程)
旋转系统
氮气
作物
作物产量
农业工程
农林复合经营
工程类
生物
化学
生态学
材料科学
有机化学
冶金
作者
Chenlin Du,Ying Liu,Jieru Guo,Wanqing Zhang,Runlai Xu,Bin Zhou,Xuechen Xiao,Zhen Zhang,Zhiqiang Gao,Yinghua Zhang,Zhao-Ling Sun,Xiaobin Zhou,Zhimin Wang
标识
DOI:10.1016/j.jenvman.2024.120236
摘要
Excessive irrigation and nitrogen application have long seriously undermined agricultural sustainability in the North China Plain (NCP), leading to declining groundwater tables and intensified greenhouse gas (GHG) emissions. Developing low-input management practices that meet the growing food demand while reducing environmental costs is urgently needed. Here, we developed a novel nitrogen management strategy for a typical winter wheat-summer maize rotation system in the NCP under limited irrigation (wheat sowing irrigation only (W0) or sowing and jointing irrigation (W1)) and low nitrogen input (360 kg N ha−1, about 70 % of traditional annual nitrogen input). Novel nitrogen management strategy promoted efficient nitrogen fertilizer uptake and utilization by both crops via optimization of nitrogen fertilizer allocation between the two crops, i.e., increasing nitrogen inputs to wheat (from 180 to 240 kg N ha−1) while reducing nitrogen inputs to maize (from 180 to 120 kg N ha−1). Three-year field study demonstrated that integrated management practices combining novel nitrogen management strategy with limited irrigation increased annual yields and PFPN by 1.9–5.7 %, and reduced TGE by 55–68 kg CO2−eq ha−1 and GHGI by 2.2–10.3 %, without any additional cost. Our results provide agricultural operators and policymakers with practical and easy-to-scalable integrated management strategy, and offer key initiative to promote grain production in the NCP towards agriculture sustainable intensification with high productivity and efficiency, water conservation and emission reduction.
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